Honing tool

ABSTRACT

A honing tool having wide, easily replaceable honing stone assemblies, each made up of an abrasive honing stone and a shell which are supported in a tool body in a manner in which the thrust loads due to honing are absorbed by the honing tool body and which allows tilting of the stone and shell assemblies to accommodate slight axial misalignment between the bore of a workpiece to be honed and the drive mechanism of the honing machine without requiring a special drive connection to accommodate such misalignment.

United States Patent [19] Harris, Jr.

[ 1 Dec. 31, 1974 1 HONING TOOL [75] lnventor: William H. Harris, Jr., Holland,

Mich.

[73] Assignee: Micromatic Industries, Inc., Detroit,

Mich.

[22] Filed: Oct. 31, 1973 [21] Appl. No.: 411,360

Related US. Application Data [63] Continuation of Ser. No. 235,606, March 17, 1972,

abandoned.

[52] US. Cl. 51/346 [51] Int. Cl B24b 5/06 [58] Field of Search 51/338-354 [56] References Cited UNITED STATES PATENTS 1,499,556 7/1924 Sargent 51/342 1,698,590 l/l929 Harter 1,831,915 11/1931 Hurum 51/340 1,950,407 3/1934 Hutto 51/342 1,955,362 4/1934 Floss 51/340 2,004,949 6/1935 lsom 51/343 2,110,756 3/1938 Blood 5l/348 2,710,497 6/1955 Billeter et al. 51/342 Primary Examiner-Othell M. Simpson Attorney, Agent, or Firm-Malcolm R. McKinnon [5 7] ABSTRACT A honing tool having wide, easily replaceable honing stone assemblies, each made up of an abrasive honing stone and a shell which are supported in a tool body in a manner in which the thrust loads due to honing are absorbed by the honing tool body and which allows tilting of the stone and shell assemblies to accommodate slight axial misalignment between the bore of a workpiece to be honed and the drive mechanism of the honing machine without requiring a special drive connection to accommodate such misalignment.

3 Claims, 8 Drawing Figures HONING TOOL This is a continuation, of application Ser. No. 235,606, filed Mar. 17, 1972 now abandoned.

SUMMARY or THE INVENTION face to be worked and the honing tool drive mechanism.

During the honing of cylindrical surfaces, a drive spindle of a honing machine is connected to a honing tool in such a manner that the axis of the drive shaft and the honing tool are substantially aligned with the axis of the bore of the cylinder to be honed. The tool is driven to reciprocate and rotate within the cylinder bore and carries a plurality of circumferentially spaced stone and shell assemblies which form the abrading means for abrading engagement with the wall of the bore of the workpiece. To produce an accurate cylindrical bore the honing machine drive, the honing tool and the bore of the workpiece require accurate axial alignment. In practice, however, it is extremely difficult to maintain a precise coaxial arrangement of thedrive spindle and the bore of the workpiece and it accordingly has been necessary to provide means for compensating for any minute misalignment so that the honing tool or the honing stone assemblies are left free to align themselves with the bore of the workpiece by engagement therewith. To accomplish such alignment it has been customary to provide a flexible or universal coupling between the tool and some point in the drive train of the honing machine. The high torques which must be transmitted through such a coupling cause problems of binding in the coupling itself which often results not only in maintenance problems but in irregularities in the wear of the abrasive material or in the finished surface of the workpiece.

Another approach to the solution of the problem is disclosed in US. Pat. No. 2,998,682 for Honing Tool Having Full-floating Body assigned to the assignee of the present invention in which a portion of the honing tool body supporting abrasive members is allowed to tilt relative to another portion of the honing tool body.

In addition, it has been the practice in the past to support honing stone assemblies directly from the honing tool body by means of garter springs which engage all of the honing stone assemblies so that replacement of one or more of the latter affects the remaining stone assemblies. Moreover, the conventional supporting springs have been fully exposed to the material abraded or removed from the workpiece.

It is an object of the present invention to provide a honing tool which overcomes the disadvantages in prior art honing equipment requiring complex drive elements and honing tools by providing a honing tool in which the honing stone and shell assemblies are sup- I ported for easy detachment and replacement and also for adjustment in such a manner that the honing tool may be rigidly attached to the honing machine drive leaving the stone assemblies to move relative to the remainder of the honing tool to accommodate for any irregularities in alignment of the honing machine drive and the tool.

It is a further object to provide such a honing tool in which the thrust loads imposed on the stone assemblies and their supporting and adjusting members is ab sorbed by the tool body leaving the adjusting mechanism for expanding the assemblies insulated from the thrust forces thereby affording freer movement and adjustment.

It is another object of the invention to provide means for easily attaching and detaching honing stone assemblies directly to their supporting and adjusting mechanism.

Still another object of the invention is to provide a honing tool in which the means to retract the honing stone assemblies into the tool body are substantially concealed within. the honing tool body and remote from the detrimental effect of the material which is removed from the workpiece being honed.

Another object of the inventionis to provide an improved honing tool that is relatively simple, economical and commercial feasible to manufacture and use and which is durable, efficient and reliable in operation.

In accordance with the present invention, an improved honing tool is provided in which the honing tool may be rigidly connected to the drive shaft of a honing machine without requiring the provision of a universal connection and one in which the stone assemblies are supported in such a manner that they not only are readily detached and replaced but so that they may move or tilt relative to the honing tool body to accommodate any irregularities in the alignment of the bore of the workpiece and the honing tool.

The above, as well as other objects and advantages of the present invention, will become apparent from the following description, the appended claims and the accompanying drawings.

DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a honing tool embodying the present invention;

FIG. 2 is a perspective view similar to FIG. 1 showing the removal of one of the parts of the honing tool;

FIG. 3 is a cross-sectional view of the honing tool shown in FIGS. 1 and 2 and taken on line 33 in FIG.

FIG. 4 is a longitudinal sectional view of the honing tool taken on line 4-4 in FIG. 3;

FIG. 5 is a broken away bottom end view of a portion of the honing tool shown in FIG. 4;

FIG. 6 is a perspective view of one of the honing stone assemblies of the honing tool shown in the prior drawings;

FIG. 7 is a view of one of the elements of the honing tool shown separately from the honing tool and taken on line 77 in FIG. 4; and

FIG. 8 is a view similar to FIG. 6 of another form of a honing stone and shell assembly.

DETAILED DESCRIPTION In general, the invention is embodied in a honing tool 11 having a body portion 13 which carries a plurality of honing stone and shell assemblies 15 which form the abrading means. As viewed in FIG. 4, each of the stone assemblies or means is mounted on a separate carrier or expansion member 17 for movement radially of the body portion 13 between a retracted position and a position in which the stone assemblies 15 protrude from the body portion 13 for contact with the walls of a cylindrical bore 19 of a workpiece 20 during rotation and reciprocation of the honing tool in the honing operation. The carrier members 17 and their associated stone assemblies or members 15 are moved radially rel ative to the tool body 13 between a retracted and a working position by an axially movable double cone, cammember 21.

More specifically, the body portion 13 of the honing tool 11 is generally cylindrical and-has a central axial bore 23, one end of which receives the end of a hollow drive shaft of a honing machine which is not shown. The body portion 13 is secured in fixed position to the hollow drive shaft 25 by means of screws 27 whereby rotation'and reciprocation of the drive shaft 25 results in rotation and reciprocation of the honing tool 11 about the axis of the bore 23.

The right or free end of the body portion 13, as viewed in FIG. 4, is provided with a plurality of longitudinally extending slots 31 each of which is adapted to receive a stone assembly 15 and its associated supporting carrier member 17. As seen in the drawings, six stone assemblies 15 and six carriers 17 are uniformly spaced in the body portion 13.

Each of the carrier members 17 has a radial outer portion, as viewed in FIG. 3, which is relatively wide and which forms a support base 33 for abutment with the back of a relatively wide honing stone assembly 15. A relatively narrower web portion 35 extends radially inward from the base 33 into the axial bore 23 of the honing tool body portion 13. As viewed in FIG. 4, the base portion 33 of the carrier member 17 is relatively long and extends from the free end of the honing tool body portion 13 to an intermediate portion of the body portion whereas the web 35 of the carrier member 17 is relatively shorter. The configuration of the slots 31 is such as to conform generally to the shape of the carrier members 17 so that opposed parallel sides of each of the slots 31 engages complementary sides of the associated carrier member 17 to prevent circumferential movement of the carriers 17'relative to the body 13 but permit radial movement. The web portion 35, however, has its end surfaces 36 spaced from the facing wall portions of the associated slot 31 for a purpose to be more fully described later.

The radially inner portion of the web 35 of each carrier 17 has a pair of longitudinally spaced, inclined surfaces 37 which are adapted to engage a pair of cones 39 of the cam member 21 disposed within the bore 23. The cam member 21 is adapted to be moved axially in the bore 23 relative to the body portion 13 by an actuator rod 41 having an end secured in an enlarged blind bore 42 in the adjacent end of the cam member 21 by means of a cross pin 43 which passes through aligned openings in the cam member 21 and an enlarged opening in the actuator rod 41. The connection permits slight axial misalignment of the cam element 21 and the actuator rod 41 which passes through the hollow drive shaft 25 of the honing machine. The tapered conical surfaces of the cones 39 contact the. inclined surfaces 37 of the carrier members 17 so that movement of the cam member 21 toward the free end of the honing tool serves to transform axial movement to radial outward movement of all of the carrier members 17. The contact of the identical cone surfaces 39 and the complementary inclined surfaces 37 on the carrier members 17 result in translational movement of each of the carrier members 17 so that the base portions 33 remain generally parallel to the axis of the cam member 21 and the bore 23 of the tool 11 and to the walls of the bore 19 in the workpiece.

The plurality of carrier members 17 are held in position in the slots 31 with the inclined surfaces 37 in engagement with the cones 39 by means of a pair of circular garter springs 45 which are disposed in a recess 46 in each of the carrier members 17 and in corresponding recesses 47 formed in the body portion 13 between each of the slots 31 as seen in FIG. 4. The aligned recesses 46 and 47 form an annular groove around the entire tool assembly 1 1. The springs 45 resiliently resist the radial. outward movement of the carrier members 17 upon movement of the cam member 21 to the right and are effective to retract the carrier members 17 upon return movement of the cam member 21.

The free end of the body portion 13 includes a plurality of shoulders 51 formed integrally with the body portion 13 and disposed between each of the slots 31 to form an interrupted flange portion. In like manner, similar shoulders 53 are spaced from the shoulders 51 and are disposed between each of the slots 31 to form another interrupted flange spaced longitudinally of the flange formed by the shoulders 51. This gives a generally spool shaped configuration to the free end of the tool body portion 13. i a

Each of the shoulders 51 and its corresponding shoulder 53 support a guide roller 55 which is disposed for rotation about an axis parallel to the axis of the bore 23 and between adjacent pairs of slots 31. As best seen in FIG. 4, the shoulder 51 and the shoulder 53 are each provided with a recess 57 facing each other and also opening radially outward. The recesses 57 receive the opposite ends of the rollers 55 and axially aligned screws 59 are disposed in openings in the aligned shoulders 51 and 53 to form an axle about which the rollers 55 rotate. The rollers 55 are adapted to act as a guide for the honing tool 11 during movement into and out of the bore of the workpiece. I

As shown in FIG. 6, each of the stone and shell assemblies 15 comprises an elongated body of abrasive material 60 having a generally uniform cross-section throughout its longitudinal length. Each of the bodies of abrasive material 60 is mounted by bonding in a backing member or shell 61. The shells may be made of light metal and are generally channel-shaped in cross-section having a base or web portion 63 and flange portions 65. One end of each shell 61 is provided with a tab 67 projecting longitudinally beyond the associated abrasive material and adapted to be received in a slot 69 formed at the end of each of the carrier members 17 as best seen in FIG. 5. The opposite end of each of the shells 61 extends longitudinally beyond its associated body of abrasive material 60 for engagement by a spring clip 73 as seen in FIG. 4.

The spring clips 73 are of a generally V-shaped configuration, each having one leg 75 rigidly connected to a carrier member 17 by riveting or the like. The other leg 77 of each of the clips 73 extends over and contacts the radially outer surface of the web 63 of the associated shell 61 when the latter is in abutment with its associated carrier 17 to securely hold the honing stone assembly in position relative to its carrier member.

During rotation of the honing tool 11, the torque loads imposed on the honing stone assemblies 15 are absorbed by the sides of the slots 31 which engage, not only the opposite sides of each of the shells 61 of the honing stone assemblies 15, but also the sides of the bases 33 forming the supporting part of the carrier members 17. It will be understood that during the honing operation the carrier members 17 are not moved radially outwardly to the extent that the shells 61 would move clear of the slots 31, and that the honing stone assemblies 15 would be considered worn out and would be replaced before the shells 61 move clear of the slots 31. During the honing operation,'the-rotating honing tool 11 also is reciprocated and longitudinal thrust loads tending to move the stone assemblies 15 longitudinally of the tool body 13 are imposed on the stone assemblies because of their contact with the wall of the bore 19 of the workpiece 20. Such loads on each of the stone assemblies 15 are absorbed by lugs 81 formed on at least one side of each of the shells 61 byfolding down an intermediate portion of one of the flanges 65. The lugs 81 are adapted to be disposed between adjacent shoulders 51 and 53 of the tool body 13 and form thrust surfaces 83 and 85. Longitudinal movement of the stone assemblies 15 relative to the tool body 13 in one direction is resisted by the thrust surfaces 85 contacting a surface 84 on each of the'ass ociated shoulders 53 and movement in the opposite direction is resisted by the thrust surfaces 83 on the lugs 81 contacting a surface 86 on each of the shoulders 51.

Thrust loads imposed on the honing stone assemblies 15 are further absorbed by the carrier members 17 to which the assemblies 15 are connected. Each of the carrier members 17 is provided with a thrust absorbing portion made up of'tab portions 87 and 88 which, as shown in FIG. 7, are formed on opposite sides of the groove 46 that receives the gartersprings 45 and at one side of the base portion 33 of the carrier members 17. The tab portions 87 and 88 form thrust absorbing surfaces 89 and 90 which correspond generally to the thrust absorbing surfaces 83 and 85'on the tab 81 of the honing stone assemblies l5and are spaced apart the same distance to fit between the shoulders 51 and 53 of the honing tool body 13. Duringreciprocationof the rotating honing tool in the bore 19 of the workpiece 20, longitudinal movement of the carrier member 17 in one direction is resisted by engagement of the thrust absorbing surface 89 with the surface 86 on the shoulder 51 and longitudinal movement in the opposite direction is resisted and absorbed by the thrust absorbing surface 90 engaging the surface 84 onthe shoulder 53. Furthermore, the location of the tab portions 87 and 88 intermediate the longitudinal length of the base portions 33 as seen in FIG. 7 and radially outward of the honing tool permits not only absorption of the thrust loads but also permits slight tilting of the carrier member 17 about a medial portion of the base 33 relative to the axis of the bore 23 of the tool body 13. lt is for this purpose that the clearance is provided between the end surfaces 36 of each of the webs 35 of the carrier 17 and the wall of the tool body 13 as viewed in FIG. 4.

Absorption of the honing tool body 13 of the thrust loads which are imposed on the honing stone assemblies 15 and, in turn, by the latter on the carriers 17 is of particular importance. Since such thrust loads are absorbed by the body portion 13 they are not transmitted to the adjustable cam member 21. As a result, the function of the cones 39 can be limited to the application of radial outward movement and radial pressure to the honing stone assemblies 15. Furthermore, the ability of the assemblies 15 and the associated carriers 17 to tilt longitudinallyurelative to the tool body 13 to accommodate slight misalignment of the honing tool and the bore 19 of the workpiece 20 makes it possible to connect the honing tool 11 directly and rigidly to the drive shaft 25 without making special provision for absorption of thrust loads or for universal connections.

In practice, the external diameter of the honing tool 11 across diametrically opposed guide rollers is slightly less than the diameter of the unhoned bore 19 of the workpiece 20 which the honing tool 11 is to enter. Before entry of the tool 11 into the workpiece the abrasive elements 15 are retracted by axial movement of the cam element 21 so that the working faces of the abrasive elements 15 are disposed radially inwardly of the outer periphery of 'the guide rollers 55. Thus, the rollers 55 serve to guide the tool in its entry into the bore and prevent the edge of the bore from striking the working faces of the abrasive elements 15 and possibly breaking them.

During rotation of the honing tool body 13 and with the latter positioned within the bore of the workpiece 20, the double cone, cam member 21 is moved axially toward the free'end of the tool to move the carrier or expansion members 17 radially outward to bring the associated stone assemblies 15 into working contact with the surface of the bore 19 to be honed. Rotation of the honing tool 11 and also reciprocation to accommodate the full axial length of the bore to be honed, causes an abrasive or honing action to take place between the bodies of abrasive material of the stone assemblies 15 and the workpiece so that material is removed from the surface of the bore 19. A selected amount of protrusion of the stone assemblies 15 from the honing tool body 13 and also the degree of pressure between the abrasive material 60 and the workpiece can be obtained by the degree to which the double cone cam memberZl is moved axially relative to the honing tool body portion 13. Honing will take place during both rotation and reciprocating movement of the honing tool 11 within the bore 19.

Once the honing operation has begun and the stone assemblies 15 are advanced into abrading engagement with the workpiece, it occasionally occurs that the abrasive material of one or more of the stone assemblies 15 will wear more rapidly than the remaining elements. Under such circumstances, the tool 11 might tend to gyrate slightly in an eccentric manner. However, the presence of the guide rollers 55 closely adjacent the working surfaces of the assemblies 15 serves to limit the amount of eccentric wear because the working faces of the abrasive material cannot wear inwardly of the outer periphery of the supporting rollers 55.

In the event that the honing operation is being conducted under conditions of slight misalignment between the axis of the tool bore 23 and the workpiece bore 19, the tool body 13 which is rigidly connected to the drive shaft 25 remains in the misaligned condition. However, the abrasive elements 15 and their respective carriers 17 are able to tilt slightly relative to the tool body 13 about the lugs 81 on the stone assemblies 15 and the complementary tabs 87 and 88 on a median faces of the bodies of abrasive material 60 to remain parallel to and to conform to the walls of the bore 19 in the workpiece 20.

Such tilting of the carrier elements 17 and their associated honing assemblies may also cause a corresponding misalignment of the axis of the cam member 21 relative to the axis of the honing tool 11. Misalignment of the cam member 21 is accommodated by the cross pin connection between the actuating rod 41 and the cam member 21.

Upon completion of the desired amount of honing, the double cone, cam member 21 may be retracted relative to the axially stationary honing tool 11 causing the garter springs 45 to urge the carrier members 17 radially inward and thereby to retract the abrading assemblies 15 out of engagement with the surface of the bore 19 of the workpiece. Thereafter, the entire honing tool 11 may be retracted from the bore of the workpiece in readiness to hone another workpiece or for the purpose of replacing worn or broken stone and shell assemblies 15.

When it becomes necessary to replace one or more of the stone assemblies 15 due to wear or breakage, as shown in FIG. 2, manual deflection of the spring clip 73 will move the leg portion 77 out of engagement with the web portion 63 of the honing stone assembly 15 permitting the entire stone assembly 15 to be pivoted so that the tab 67 may be removed from its complementary slot'69 in the end of the carrier member 17. It will be noted that the removal of the stone assembly 15 in no way interferes with the garter springs 45 which continue to maintain all of the carrier members 17 within the tool body portion 13. To replace the removed stone assembly 15 with a new assembly, all that is required is to place the tab 67 of the shell 61 of a new honing stone assembly 15 within the slot 69 and to deflect the spring clip 73 to afford clearance between the leg 77 and the web portion 63. Upon release of the clip 73, the leg 77 engages the web and holds the honing stone assembly 15 securely in position relativeto its carrier member 17. One or more of the stone assemblies 15 may be replaced without removing the honing tool 11 from the drive shaft 25 of the honing machine by moving the honing tool out of the bore 19 of the workpiece to give access to the abrasive elements 15 and the spring clips 73.

The stone assemblies 15 are relatively wide and occupy a substantial portion of the circumferential outer surface of the honing tool 11. This makes it possible not only to have a greater abrasive honing surface in contact with the cylindrical bore 19 of the workpiece.

at any given time, but also it makes it possible to use other forms of abrasive assemblies such as the one shown in F IG. 8. in this embodiment, a stone and shell assembly 15a has a shell 61 identical to the shell for the stone assembly 15 shown in FIG. 6. However, two elements of abrasive material 91 are spaced apart by a spacer element 93 and all of the elements 91 and 93 are bonded to each other and to the shell 61 to form an integral unit. The stone assembly 15a is used in the same manner as the assembly 15 described previously. Use of stone assembly 15a doubles the number of working faces in contact with the surface to be worked and increases the capacity of the honing tool 11. Since the ability of a honing tool to remove metal from a workpiece is dependent on not only the area of the abrasive material in contact with the workpiece but also on the linear length of the working face of the abrasive material in contact with the workpiece at any given time.

It should benoted that the stone assemblies 15 or 15a may be readily removed and new assemblies 15 or 15a snapped into place, all without disturbing the remaining stone assemblies or the garter springs 45 which remain in position to retain the carrier elements 17 relative to the honing tool body 13. By contrast, it has heretofore been customary to use springs of this type to retain the stone assemblies themselves and displacement of the springs to remove one stone assembly also affected the spring contact with at least the adjacent stone assemblies. Moreover, in the present embodiment of the invention, the garter springs 45 are substantially concealed within the honing tool 11 whereas, in conventional honing tools, the springs have been completely exposed to abrasive material which separates from the stone assemblies 15 or 15a during the honing operation. 1

It will be noted that in the particular embodiments shown, the circumferential area occupied by the abrasive elements is almost one-half the circumference of the honing tool 11. This makes it possible to have a much larger area of contact of abrasive material with the surface to be honed than in conventional honing tools. As a result, for any given hardness of stone material, the rate of material removal would be higher than in conventional honing tools. Moreover, the same cutting rates as with conventional honing stone assemblies may be accomplished by using less radial pressure and softer honing stones which tends to substantially reduce the noise level at which the honing tool operates.

It will now be seen that there has been provided a honing tool which may be directly and rigidly connected to the drive shaft of a honing machine without making the provision or universal connections and one in which the honing stone assemblies are supported relative to their carriers for rapid and easy detachment and replacement andvalso are arranged in a manner to accommodate misalignments that may occur between the honing tool and the bore of the workpiece to be honed. Additionally, the honing stone assemblies may be made wider than conventional stone assemblies to increase the rate of honing or to accommodate honing at reduced pressures between the abrasive material and the bore of the workpiece.

While preferred embodiments of the invention have been illustrated and described, it should be understood that various changes and modifications may be made without departing from the spirit of the invention.

1 claim:

1. A honing tool comprising, in combination, a body adapted to be supported for rotational movement about a longitudinal axis in the bore of a workpiece, said body forming a longitudinally extending outwardly opening slot therein, a carrier member disposed in said slot for radial sliding movement relative to said body, means to move said carrier member radially relative to said body to selected positions, means connecting said carrier member to said body for limited tilting movement relative to the axis of rotation of said body, an abrasive honing member, means detachably connecting said abrasive honing member to said carrier member for movement therewith into and out of engagement with the bore of said workpiece, said body including shoulder portions longitudinally spaced onsaid body adjacent at least one side of said slot, said means connecting said carrier member to said body including an abutment portion formed on at least one side of said carrier member and disposed between said shoulder portions to limit longitudinal movement of said carrier member relative to said body, said abutment portion being disposed intermediate longitudinally spaced opposite ends of said carrier member about a median portion thereof relative to said body.

2. A honing tool comprising, in combination, a body adapted to be supported for rotational movement about a longitudinal axis in the bore of a workpiece, said body forming a longitudinally extending outwardly opening slot therein, a carrier member disposed in said slot for radial sliding movement relative to said body, means to move said carrier member radially relative to said body to selected positions, means connecting said carrier member to said body for limited tilting movement relative to the axis of rotation of said body, an abrasive honing member, means detachably connecting said abrasive honing member to said carrier member for movement therewith into and out of engagement with the bore of said workpiece, said body including shoulder portions longitudinally spaced on said body adjacent at least one side of said slot, said means connecting said carrier member to said body including an abutment portion formed on at least one side of said carrier member and disposed between said shoulder portions to limit longitudinal movement of said carrier member relative to said body, said abrasive honing member including abutment means formed on at least one side thereof and adapted to be disposed between said shoulder portions to limit axial movement of said abrasive honing member.

3. In a honing tool adapted to be rotatably driven in the bore of a workpiece, a body member, a plurality of carrier members extending longitudinally of said body member and supported thereby for radial movement relative to said body member, means adjusting the position of said carrier members radially of said body member during rotation of the latter, abrasive honing members extending longitudinally of said body member, means connecting each of said abrasive honing members to a carrier member for movement therewith, thrust means operatively connecting each of said carrier members to said body member for tilting movement independently of each other relative to the axis of rotation of said body member, said means connecting said abrasive honing members to said carrier members each including a socket portion formed on one end of each of said carrier members, and fastener means supported by each of said carrier members and adapted to engage and hold the other end of the corresponding one of said abrasive honing members. 

1. A honing tool comprising, in combination, a body adapted to be supported for rotational movement about a longitudinal axis in the bore of a workpiece, said body forming a longitudinally extending outwardly opening slot therein, a carrier member disposed in said slot for radial sliding movement relative to said body, means to move said carrier member radially relative to said body to selected positions, means connecting said carrier member to said body for limited tilting movement relative to the axis of rotation of said body, an abrasive honing member, means detachably connecting said abrasive honing member to said carrier member for movement therewith into and out of engagement with the bore of said workpiece, said body including shoulder portions longitudinally spaced on said body adjacent at least one side of said slot, said means connecting said carrier member to said body including an abutment portion formed on at least one side of said carrier member and disposed between said shoulder portions to limit longitudinal movement of said carrier member relative to said body, said abutment portion being disposed intermediate longitudinally spaced opposite ends of said carrier member about a median portion thereof relative to said body.
 2. A honing tool comprising, in combination, a body adapted to be supported for rotational movement about a longitudinal axis in the bore of a workpiece, said body forming a longitudinally extending outwardly opening slot therein, a carrier member disposed in said slot for radial sliding movement relative to said body, means to move said carrier member radially relative to said body to selected positions, means connecting said carrier member to said body for limited tilting movement relative to the axis of rotation of said body, an abrasive honing member, means detachably connecting said abrasive honing member to said carrier member for movement therewith into and out of engagement with the bore of said workpiece, said body including shoulder portions longitudinally spaced on said body adjacent at least one side of said slot, said means connecting said carrier member to said body including an abutment portion formed on at least one side of said carrier member and disposed between said shoulder portions to limit longitudinal movement of said carrier member relative to said body, said abrasive honing member including abutment means formed on at least one side thereof and adapted to be disposed between said shoulder portions to limit axial movement of said abrasive honing member.
 3. In a honing tool adapted to be rotatably driven in the bore of a workpiece, a body member, a plurality of carrier members extending longitudinally of said body member and supported thereby for radial movement relative to said body member, means adjusting the position of said carrier members radially of said body member during rotation of the latter, abrasive honing members extending longitudinally of said body member, means connecting each of said abrasive honing members to a carrier member for movement therewith, thrust means operatively connecting each of said carrier members to said body member for tilting movement independently of each other relative to the axis of rotation of said body member, said means connecting said abrasive honing members to said carrier members each including a socket portion formed on one end of each of said carrier members, and fastener means supported by each of said carrier members and adapted to engage and hold the other end of the corresponding one of said abrasive honing members. 